TX50e - dhs ELMEA tools

Platform Highlights
▪ High resolution, 3.5” color LCD with intuitive menu structure
▪ Tri-color LED’s for real-time monitoring of circuit status
▪ Compact and robust design optimized for field applications
▪ Durable membrane keypad for reliable operation in all wea-
ther conditions
▪ Dual receiver enabling bi-directional protocol analysis via PC
▪ High capacity rechargeable battery allowing 6 hours continu
ous operation
▪ USB to PC interface for remote control, report generation
and Printing
▪ Voice channel monitoring and access via external headset
and microphone
Transport Expert
2008 Global Test & Measurement
Emerging Company of the Year Award
TX50e
Handheld 2Mbps Test Set
The TX50e is a feature rich hand-held solution for
testing and evaluating 2 Mbps and 64 kbps digital
circuits. A unique combination of signal quality
measurements including ITU-T compliant BER performance
analysis makes the unit a perfect choice for
technicians installing, maintaining or troubleshooting
2 Mbps networks.
Key Features
▪ In-Service and Out of Service measurements
▪ 2 Mbps and N x 64Kbps support
▪ Auto configuration
▪ Frequency and Level measurements
▪ Line rate offset
▪ Round Trip Delay
▪ Error and alarm insertion/measurements
▪ PRBS, fixed and user defined test patterns
▪ Analysis per G.821, G.826 and M.2100
▪ Timeslot contents and activity monitor
▪ Pulse shape analysis per G.703 mask and limits
▪ Oscilloscope function to view 2 Mbps signal
▪ Jitter measurement and generation to ITU 0.171
▪ Maximum Jitter Tolerance (MTJ)
▪ Jitter Transfer Function (JTF) analysis
▪ Voice frequency generation and analysis

User Interface
Intuitive menu structure enables rapid configuration and accessibility
of the instrument. Signal, error and alarm status and conditions
are reported visually using a set of tri-color LEDs. Alarm and error
history conditions can be reset easily using a dedicated front panel
key.
Voice Frequency Testing
Channels can be tested and monitored in-service for level and
quality using different techniques. A built-in PCM codec and an
external headset and microphone connected to the analogue port
provide the capability to insert or listen to voice in user selectable
timeslots. Alternatively, digital tones can be generated internally
and inserted into user selectable N x 64 kbps timeslots enabling
more advanced audio analysis of level and frequency response.
Bit Error Rate Testing
PRBS and fixed test patterns including user programmable bit
sequences (words) are provided. BER measurements can be
performed using either framed or unframed signals, AMI or HDB3
line coding or at 2 Mbps or fractional N x 64 kbps rates. Error and
alarm generation allow the user to stimulate and examine the
responses of the network.
Frame and TS Monitoring
A complete overview of the framing status and timeslot activity
is provided. All bits of the PDH frame are monitored, and their
associated values are displayed in real time in Binary, Hexadecimal,
or ASCII formats. Monitoring includes FAS, MFAS and NFAS words
including Si, Sa and E-bits. Channel Associated Signalling (CAS)
bits of all 30 channels are displayed in real time with idle or busy
indication.
Pulse Shape Analysis
Impedance mismatches and jitter degrade network performance
and problems are often linked to pulse distortion and level. The
Pulse Shape feature helps to identify these physical abnormalities
by capturing, displaying, and verifying the 2 Mbps Pulse according
to limits defined in G.703 recommendations.
Oscilloscope Function
A snapshot of positive and negative pulse train comprising the 2
Mbps signal can be analyzed using the oscilloscope mode. This
measurement capability ensures the signal is properly terminated
and is often used in combination with the Pulse Mask feature to
detect and rectify signal distortion.

Performance Analysis
Performance analysis according to G.821, G.826 and M.2100
recommendations is provided.
Out of-service G.821 analysis can be performed on either 64
kbps sub-rate or 2 Mbps full rate signals using a selection of test
patterns.
In-service G.826 block based measurements evaluate near and far
end parameters simultaneously to establish QOS conditions.
M.2100 test recommendations provide technicians a consistent set
of procedures for bringing into service new networks according to
defined performance objective ratios and thresholds.
Jitter Generation
Maximum Tolerable Jitter (MTJ) and the Jitter Transfer Function
(JTF) test capabilities identifies marginal network equipment.
The Maximum Tolerable Jitter (MTJ) test function implemented on
the Tx50e determines the maximum jitter amplitude that can be
applied to a network element before bit errors are produced on the
output signal. The MTJ test results are presented in both tabular
and graphical formats - the graphical results can be superimposed
and compared to a tolerance mask pre-defined by ITU standards.
Protocol Analysis
Powerful bi-directional protocol analysis is made possible
thanks to innovative product design and popular
post processing techniques.
Configured in passive monitoring mode, dual receivers
proceed to capture and retrieve signaling information
from selected time slots - internal circuits convert this
data into an Ethereal compatible file format. Data
transfer to a PC is achieved using an USB cable and the
unit’s built-in USB interface. Specially developed PC
software preconfigured with timeslot and file storage
settings, records the data for subsequent analysis.
Ethereal, a free open source software supporting a
multitude of signaling protocols including ISDN, GSM,
SS#7 and IP, can now be used to analyze the data.
The Jitter Transfer Function (JTF) on the other hand determines
whether a network element amplifies or reduces jitter. Essentially,
jitter is applied at various frequencies to the input of the network
element or DUT and then compared to the jitter measured at the
output. The logarithmic ratio between input and output is the
Jitter Transfer Function. Similar to the Jitter Tolerance test, a
tolerance mask for the Jitter Transfer Function is also provided.
Jitter Measurement
Jitter is the short term frequency deviation of the digital signal
which can be caused by several factors including regenerators
being affected by noise on the transmission line - multiplexing
of lower rate PDH signals into higher rate PDH signals is another
cause. The Jitter option implemented on the TX50e is a simple yet
powerful tool to identify and test various clocking and synchronization
problems occurring in a PDH network.
Jitter measurement according to ITU 0.171 recommendations is
performed on the actual 2 Mbps traffic flow by using proprietary
algorithms. In and out-of-service measurements are available in
monitor or terminated operating modes respectively.

Specifications
Transmitter
Interface
Number of test ports: 1
Interface and Pulse Shape: Conforms to G.703
Bit rate: 2,048 Mbit/s
Impedance: 120Ω balanced or 75Ω unbalanced
Connectors: RJ45 or banana (120Ω) or BNC (75Ω)
Line coding: AMI, HDB3
Max. Output jitter: 0.015 UIpp (Conforms to G.823)
Clock source
Internal: 2,048 Mbps ± 3 ppm
External: 2,048 MHz or 2,048 Mbps
Recovered: From received signal
Offset ± 6 kHz in 1 Hz resolution
Signal Structure
PCM-30, PCM-31, PCM-30C, PCM-31C, Unstructured conforms to
G.704
64 kbps, n x 64 kbps, contiguous or non-contiguous
Test patterns
PRBS: 2n-1 where n = 6, 9, 11, 15, 23
Fixed: All 1, All 0, 1010
User programmable: 24 bit words
Polarity: Normal or inverted
VF Testing
Code law: A-Law
Frequency generation: 1 kHz
Level: -3 dBm0
Headset/microphone interface for talk listen
Alarms and Errors
Generation modes: Single, continuous, user defined
Error rates: 1 x 10-n, where n= 2 to 7
Alarm types: LOS, AIS, LOF, LOM, RDI, RMA, LSS
Error types: Bit, E-bit, FAS, MFAS, CRC, REBE
Receiver
Interface
Number of test ports: 2 (Rx, Sync)
Interface: Conforms to G.703
Bit rate: 2,048 Mbit/s
Impedance: 120ohm balanced or 75ohm unbalanced
Sensitivity: Up to -36 dB in the long-haul mode
Maximum input jitter: Conforms to G.823
Clock signal
Recovered from received data stream
Signal structure and test patterns
Same as transmitter
Measurements
Alarms: LOS, AIS, LOF, LOM, RDI, RMA, LSS
Errors: Bit, code, FAS, MFAS, CRC, REBE
VeEX Inc.
2255, Martin Ave., Suite G,
Santa Clara, CA 95050, USA
Tel: +1.408.970.9090
Fax: +1.408.970.9099
www.veexinc.com
customers@veexinc.com
Performance Analysis
G.821: test pattern ES, SES, US, %ES, %SES, %US
G.826: ES, SES, BBE, US, %ES, %SES, %US.
M.2100: 2,048 Mbit/s with CRC, ES, SES, BBE, US,
%ES, %SES, %US.
Pulse shape Analysis
Rise time, fall time, pulse width, level measurement
Oscilloscope function (SW option)
Frequency passband: 0.01 to 10 MHz
Attenuation: 0dB, 6 dB, 12dB
Jitter measurement (SW option)
Measurement: Conforms to ITU O.171
Range: 0.05 to 10 UIpp
Accuracy: 0.02±5% UIpp
General Specifications
Size 155 x 85 x 40 mm (H x W x D)
(6.1 x 3.34 x 1.57 in)
Weight Less than 0.5 kg (less than 1.1 lbs)
Battery NiMH with 6 hours autonomy
AC Adapter 100 to 240 AC, 50/60Hz
Display 320x240 pixels, backlight color LCD
LED SIG, AIS, FRM, MFR, RDI, SES, RMA, PAT
Remote Control USB slave mode
Ordering Information
Z04-99-001G E1 Handheld Tester with Pulse Mask Analysis,
RJ45 Interface
Z04-99-002G E1 Handheld Tester with Pulse Mask Analysis,
BNC Interface
Interfaces/Test Options
Z88-00-002G Jitter Generation/Measurement
Z88-00-003G PC Software for Protocol Capture via USB
Recommended Accessories
F02-00-004G USB Cable
F02-00-008G RJ48 to BNC Test Cable, 2 m
F02-00-009G RJ48 to 3-Pin Banana Test Cable, 2 m
F02-00-010G BNC to BNC Test Cable, 2 m
Replacement Items
A03-00-003G AC Adaptor, US Plug
A03-00-004G AC Adaptor, EU Plug
A03-00-005G AC Adaptor, UK Plug
C01-00-001G Carrying Case (Basic)
© 2007-2008 VeEX Inc. All rights reserved.
VeEX is a registered trademark of VeEX Inc. The information contained
in this document is accurate. However, we reserve the right to change
any contents at any time without notice. We accept no responsibility for
any errors or omissions. In case of discrepancy, the web version takes
precedence over any printed literature.
D05-00-011P B00 2008/05